SB2026052651 - Remote code execution in 7-Zip

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds write (CVE-ID: CVE-2026-48095)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to out-of-bounds write in the NTFS archive handler when processing a crafted NTFS image containing a compressed stream. A remote attacker can trick the victim into opening a crafted file to execute arbitrary code.

User interaction is required to open the crafted image, and the issue is triggered during extraction or testing of a compressed file from the image.

Remediation

Install update from vendor's website.

References

• https://securitylab.github.com/advisories/GHSL-2026-140_7-Zip/
• https://sourceforge.net/p/sevenzip/discussion/45797/thread/555e132ba4/